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l2cap: fix crash when requesting ERTM but remote does not support ERTM at all

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This commit is contained in:
Matthias Ringwald 2019-01-10 15:42:45 +01:00
parent 278494d6b3
commit 61c3f6de95
1 changed files with 9 additions and 0 deletions
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9
src/l2cap.c
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@ -1489,6 +1489,15 @@ static void l2cap_run(void){
case L2CAP_STATE_CONFIG:
if (!hci_can_send_acl_packet_now(channel->con_handle)) break;
#ifdef ENABLE_L2CAP_ENHANCED_RETRANSMISSION_MODE
// fallback to basic mode if ERTM requested but not not supported by remote
if (channel->mode == L2CAP_CHANNEL_MODE_ENHANCED_RETRANSMISSION){
if (!l2cap_ertm_mode(channel)){
l2cap_emit_simple_event_with_cid(channel, L2CAP_EVENT_ERTM_BUFFER_RELEASED);
channel->mode = L2CAP_CHANNEL_MODE_BASIC;
}
}
#endif
if (channel->state_var & L2CAP_CHANNEL_STATE_VAR_SEND_CONF_RSP){
uint16_t flags = 0;
channelStateVarClearFlag(channel, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_RSP);